Packing for pistons and plungers



2 Sheetsq-Sheet 1.

[77 We WO'R. W1/.3, Hoo Ker (No Model.) Y

W. D.. HOOKER.

PACKING FOR PISTONS AND PLUNGERS.

' Patented June 26, 1883L $-C.. ZWWW" Phuml ilhngnpher. wnhnghn. D. C

(No Modem 2 sheetssheen 2.

W. D. HOOKER. PACKING PQR PIsToNs AND PLUNGBRS. L

No. 280,088. Patented June 26, 1883.

vpatent by me.

UNITED. .STATES `PATENT OFFICE.

WILLIAM D. HOOKER, or sr. LOUIS, MISSOURI.

PACKING FOR PISTONs AND PLUNGERS.

SPECIFICATION forming' part of Letters Patent No. 280,038, dated June 26, 1883.

y Application filed Angust29,1852. (No model.) I

To @ZZ whom it may concern: l Be it known that l, WILLIAM D. HOOKER, a citizen of the United States, residing at St.

Louis, in the county of St. Louis and State of l Missouri, have invented certain new and useful Improvements in Packings for Pistons and Plungers; andI do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part'of this specification.

-My invention has reference to packings for pistons, and is more particularly designed for use on a plunger-pump.

rIhe invention as shown in the drawings is used in conjunction with a pump having a-peculiar valve system, which has recently been made the subject of a separate application for I make a portion of the `plunger-case removable in order to have ready access to the packing-seat when occasion requires. I insert the packing around the plunger against a shoulder on the interior of the plunger-barrel, and operate a suitable gland from the exterior of the barrel to compress and adjust the packing and keep it always tight about the plunger. Any ofthe approved )materials used in packing which possess sufficient mobility to allow compression and adjustment by a" moderate force may be em-V ployed in my device. The packing is adjusted without Stopping the pump.

The accompanying drawings form a part of this Specication, and illustrate what I consider the bestrmeans of embodying the invenl tion.

placed the series of valves before referred to.

j A is the plunger barrel or cylinder, provided with a shoulder, a., Surrounding and snugly tting the plunger B.

C is the removable plunger-bonnet, fitted to 5 5 I the barrel A by means of lips and connectingybolts, as shown, or in any other suitable man# mer, taking care, however. to make the juncture secure and tight. llar in general outline, but is provided with 6o rlhe bonnetO is circuside swells, c c, for t-he reception of parts hereinafter to be described. A contracted nose, C, is formed on the outer end of the bonnet. It is flattened, and in one direction entends the entire width of the bonnet and side swells, 6 5 c c, while in the other it has an interior opening the same width as or slightly wider than the side swells, and Vforms a continuation of them.

Z iS the packing, fitted around the plunger 7o against the Shoulder a. The packing is held `in place. by a circular gland, l), which is operated by a screw from the exterior of the plunger-bonnet. The gland D may be made I of any suitable packing metal and iits snugly` 7 5 around the plunger and in the barrel. Lugs d d, formed upon the sides, form connections for the side bars or connecting-rods, D D, which, with the lugs d, lie in the hollow ofthe side swells, c.A At the outer ends the rods D 8O are connected by a crossfhead, D2, secured upon thembynuts. This cross-head corresponds in length to the distance between the outer surfaces of the lugs, so asv to allow of moving in the nose C. g

G is the adjusting-screw, working in the threaded opening in the cross-head or connecting-strap D2. It is provided withasquare end, g, extended outside of the plunger-bonnet, which is worked by a Suitable wrench. 9o Itis provided with a collar, g', fitting against the interior face of the end of the nose G', and a check-nut, g2, screwed up against the ef@ terior of the nose on a threaded portion of the screw. TheV collar g and check-nut gt keep 95 the screw iirm longitudinally. XVhenever the screw is operated to set the gland and adjust the packing, the check-nut is changed to ac* commodate it and hold it securely.

The side'bars, D', may be screwed into the Ioo lugs d, or formed in one with them and the gland, or otherwise suitably united.

The plunger-barrel for a short distance from the shoulder a is made plane and true to fit the gland D and accommodate lthe packing. The gland D and its connections to the screw G, together with said screw, are all contained in the plunger-bonnet, and are removed and replaced with it. Vhen the bonnet and its contents are removed, the plunger can be packed with any proper packing and the bonnet with its contents replaced. erating the screw from the exterior of the bonnet the gland can be screwed up, against the packing until it is properly compressed and held in place by the check-nut. As the packing wears away it can be screwed up, without removing the plunger-bonnet and without stopping the pump, by simply operating the screw G from the exterior. lt may thus be adjusted until all the packing is worn away, when the bonnet can be again removed and the plunger repacked.

The extended length of the plunger-bonnet covers the side arms or bars, D, and when removed will take the said arms, the gland, and attachments with it. The bonnet is of the same size as the pump-barrel. XVhen the screw G is moved to operate the gland there is a tendency to twist the cross-head vD2, but this is entirely overcome by the contracted nose C,which prevents the cross-head from being twisted. They may be applied to pumps already in use by making provisions for securing the bonnet and providing a shoulder for the packing to abut against. They are adapted for use on all characters of' pistons where the length of stroke does not exceed the length ofthe piston.

Modifications may be made without departing from the principle of the invention. Parts ofthe invention may be used without the whole. The invention is equally applicable whether used in connection with my improved valve system or not.y l can dispense with the contracted nose C and extend the bonnet full size to the end, with the side swells for the reception of the cross-strap D, but I-prefer to use the nose, as it holds the parts more firmly and reduces the space in the bonnet at a point where itis neither desirable nor useful. lf desirable,

Then by op- I may provide the protruding portion of the screw G with a hand-wheel for setting it.

Having thus described my invention, what I claim is l. The combination ofthe plunger-bonnet, of a length sufficient to cover the contained rods, and of the saine size as the pump barrel or cyl- 5 5 inder, with the said barrel or cylinder provided with an abutting means, the gland, and mech anism for operating the gland, substantially as set forth.

2. The combination,with the cross-head D2, 6c the gland, and their connecting-bars, of aplunger-bonnet having a contracted nose for guiding the cross-head, as set forth.

3. The screw-threaded cross-head D2, in combination with the screw G, collar g', check-nut 6 5' 02, rods D/, and gland D, substantially as set forth.

4. The removable bonnet provided with si de swells, in combination with the packing material, abutting means, gland, connecting-rods, 70 cross-head, and adjusting-screw, substantially as set forth. Y y

5. The combination,with the abutting means an d packing material, of the compressinggland, connecting-rods set out of line ofthe 75 gland, cross-head and adjusting-screw provided with a fixed collar and check-nut, and the plunger-case, substantially as set forth.

6. The combination, with the compressinggland, adjusting -screw, and connections be` So tween said parts, ofthe removable plunger-bonnet having the compressed nose, substantially as described. y

7. The removable bonnet with its contained gland, parallel rods, cross-head, and adjusting- 8 5 screw, in combination with the shoulder on the interior of the plunger-barrel, interposed packing material,and plunger,substantially as set forth. e

In testimony whereof I affix my signature in 9o presence of two witnesses.

VILLIAM DAVIS HOOKER.

lVitnesses:

D. D. FISHER, L. FRANK OrrorY. 

